Must be a valid IPv4 or IPv6 ip address, e.g. 127.0.0.1 or 2001:DB8:0:0:8:800:200C:417A
Basic Info

City: unknown

Region: unknown

Country: United Kingdom of Great Britain and Northern Ireland

Internet Service Provider: Microsoft Limited

Hostname: unknown

Organization: unknown

Usage Type: Data Center/Web Hosting/Transit

Comments:
Type Details Datetime
attackspambots
Brute forcing email accounts
2020-08-06 15:53:06
Comments on same subnet:
No discussion about this subnet yet..
Whois info:
b
Dig info:
; <<>> DiG 9.10.3-P4-Ubuntu <<>> 51.104.21.104
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 8638
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;51.104.21.104.			IN	A

;; AUTHORITY SECTION:
.			523	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2020080602 1800 900 604800 86400

;; Query time: 68 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Thu Aug 06 15:53:02 CST 2020
;; MSG SIZE  rcvd: 117
Host info
Host 104.21.104.51.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 104.21.104.51.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
129.211.67.139 attack
Jun  5 05:46:56 serwer sshd\[29311\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=129.211.67.139  user=root
Jun  5 05:46:58 serwer sshd\[29311\]: Failed password for root from 129.211.67.139 port 50986 ssh2
Jun  5 05:52:38 serwer sshd\[29969\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=129.211.67.139  user=root
...
2020-06-05 17:00:27
162.243.141.140 attackbotsspam
Fail2Ban Ban Triggered
2020-06-05 16:56:31
106.54.184.153 attackbots
Jun  5 09:19:57 legacy sshd[22644]: Failed password for root from 106.54.184.153 port 44890 ssh2
Jun  5 09:23:10 legacy sshd[22732]: Failed password for root from 106.54.184.153 port 52408 ssh2
...
2020-06-05 16:58:13
79.137.2.105 attackspambots
Jun  5 03:47:31 ws24vmsma01 sshd[49735]: Failed password for root from 79.137.2.105 port 50215 ssh2
...
2020-06-05 16:35:58
36.37.82.115 attackspambots
 TCP (SYN) 36.37.82.115:49997 -> port 3389, len 40
2020-06-05 17:11:54
54.37.157.88 attackspam
2020-06-05T02:05:15.3715001495-001 sshd[29701]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=88.ip-54-37-157.eu  user=root
2020-06-05T02:05:17.5711261495-001 sshd[29701]: Failed password for root from 54.37.157.88 port 46111 ssh2
2020-06-05T02:07:46.7237811495-001 sshd[29797]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=88.ip-54-37-157.eu  user=root
2020-06-05T02:07:48.8803911495-001 sshd[29797]: Failed password for root from 54.37.157.88 port 38529 ssh2
2020-06-05T02:10:13.9936911495-001 sshd[29873]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=88.ip-54-37-157.eu  user=root
2020-06-05T02:10:15.3314231495-001 sshd[29873]: Failed password for root from 54.37.157.88 port 59182 ssh2
...
2020-06-05 17:00:44
213.195.222.126 attackbotsspam
(CZ/Czechia/-) SMTP Bruteforcing attempts
2020-06-05 16:48:02
5.196.70.107 attackspam
Jun  5 07:46:58 vps639187 sshd\[22361\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=5.196.70.107  user=root
Jun  5 07:47:01 vps639187 sshd\[22361\]: Failed password for root from 5.196.70.107 port 45120 ssh2
Jun  5 07:56:56 vps639187 sshd\[22502\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=5.196.70.107  user=root
...
2020-06-05 16:31:26
175.24.131.200 attackspambots
Jun  5 10:32:55 gw1 sshd[5570]: Failed password for root from 175.24.131.200 port 52512 ssh2
...
2020-06-05 16:31:47
18.136.238.223 attackspambots
(sshd) Failed SSH login from 18.136.238.223 (SG/Singapore/ec2-18-136-238-223.ap-southeast-1.compute.amazonaws.com): 5 in the last 3600 secs
2020-06-05 16:37:31
207.248.113.73 attackbots
(smtpauth) Failed SMTP AUTH login from 207.248.113.73 (MX/Mexico/dhcp-207.248.113.73.redes.rcm.net.mx): 1 in the last 3600 secs; Ports: *; Direction: inout; Trigger: LF_TRIGGER; Logs: 2020-06-05 12:16:11 plain authenticator failed for ([207.248.113.73]) [207.248.113.73]: 535 Incorrect authentication data (set_id=training)
2020-06-05 16:59:53
185.110.95.5 attackbots
trying to access non-authorized port
2020-06-05 17:11:23
189.146.187.70 attack
06/04/2020-23:53:02.099631 189.146.187.70 Protocol: 6 ET SCAN Suspicious inbound to MSSQL port 1433
2020-06-05 16:50:00
198.108.66.214 attackbotsspam
IP 198.108.66.214 attacked honeypot on port: 3054 at 6/5/2020 4:52:21 AM
2020-06-05 17:07:46
125.124.117.106 attackspam
2020-06-05T03:53:12.522118homeassistant sshd[8946]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=125.124.117.106  user=root
2020-06-05T03:53:14.594612homeassistant sshd[8946]: Failed password for root from 125.124.117.106 port 41704 ssh2
...
2020-06-05 16:34:37

Recently Reported IPs

211.80.102.187 90.91.155.88 67.230.171.161 45.195.201.111
176.236.29.162 125.163.72.109 190.200.233.185 177.54.146.61
105.245.116.241 147.189.120.177 142.4.213.28 10.123.136.232
146.11.43.249 177.214.79.83 217.181.113.172 196.121.195.218
45.139.185.48 17.205.11.236 114.18.56.245 33.10.164.65